Having read previous blog/forum posts about this, I downloaded the latest Media module version, however, I still get the following:
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File type mp4 is not valid in this context. Valid File Types Include: jpg,jpeg,jpe,gif,bmp,png,swf,.swf,.avi,.wmv,.midi,.wav,.asx,.mp3,.mpeg,.asf,.wma,.ram,.rpm,.rm,.mov,.qt,.mp4
.
As you can see, I've added the file type MP4 to the Host Settings configuration for this particular portal.

Please advise.

I can't get the media module (version 3.2.3) on Dot Net Nuke version 05.06.03 (45) to allow .mp4 files.  My site allows for .mp4 and I've uploaded my video to the site already. 

When I go into my media module and attempt to choose a file that is already on my site, I navigate to the folder that holds my .mp4 and several .wmv files, but I can ONLY see .wmv files, not my mp4.

When I go into my media module and try to upload my .mp4 file, I get this:  File type mp4 is not valid in this context. Valid File Types Include: jpg,jpeg,jpe,gif,bmp,png,swf,AVI,MPEG,MP3,ASF,ASX,WMA,WMV,WAV,MIDI,QT,MOV,RM,RAM,RPM

does any one no why i cant see any movie related items that are in the folder when i try to use the media module. i can see all of my pics fine but not the video files and they are all listed in the host settings if possible a setup guide for the media module would be nice . i am still new to the whole dnn thing.

Running DNN 6 and media 4